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Vulnerability record · CVE-2015-1638 · published 14 April 2015

CVE-2015-1638: Microsoft windows server 2012 permissions and access controls vulnerability

Microsoft · Windows Server 2012

Microsoft Active Directory Federation Services (AD FS) 3.0 on Windows Server 2012 R2 does not properly handle logoff actions, which allows remote attackers to bypass intended access restrictions by leveraging an unattended workstation, aka "Active Directory Federation Services Information Disclosure Vulnerability."

5.8 CVSS 2.0 Medium EPSS 13% · top 3.9% CWE-264 · Permissions and access controls
5.8CVSS 2.0 base score
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Microsoft Active Directory Federation Services (AD FS) 3.0 on Windows Server 2012 R2 does not properly handle logoff actions, which allows remote attackers to bypass intended access restrictions by leveraging an unattended workstation, aka "Active Directory Federation Services Information Disclosure Vulnerability."

AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1032115
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-040
http://www.securitytracker.com/id/1032115
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-040

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2015-1638), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.